This CL fixes the lengths of the console dir() and table() methods to
match the WHATWG Console Standard and the IDL WPTs.

R=mathias@chromium.org

Bug: chromium:948678
Change-Id: I2c603e202a3e5995eec06dadac09807f76ee9167
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1902968Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Dominic Farolino <dom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64840}